1997 Cadillac SLS SLIGHTLY OVERHEATS

I JUST PUT A RADIATOR IN 97 SEVILLE, THE RADIATOR I PUT IN HAD TWO OTHER PORTS ON THE PASSENGER SIDE OF RADIATOR, MAYBE FOR ENGINE OIL COOLING, SINCE I PUT THE RADIATOR IN THE CAR DOESNT ACCLERATE FOR FIRST 2500 RPM, IT HESITATES, AND CAR WANTS TO OVERHEAT BUT I DONT LET IT GET THAT FAR.I SHUT IT OFF, PLEASE DIAGNOSE!